.book-tabs{
    width: 55%;
    margin: 0 auto;
    overflow: hidden;
    margin-top: 8rem;
}
.book-show{
    width: 60%;
    height: 120rem;
    margin: 0 auto 2rem;
}
.book-sub-show{
    float: left;
}
.book-picture{
    width: 20rem;
    height: 20rem;
}
.book-show1{
    width: 60%;
    height: 10rem;
    margin: 0 auto;
}